Knockout Mapping Validation

Question

I\'m trying to attach validation to a mapped view. I\'m using Knockout Mapping and Validation plugins. Pseudo-models:

Person {
    int Id;
    string Name;
          


        

Answer 1

Another way is to extend the observable after it has mapped.

function viewModel() {
    var self = this;
    self.persons = ko.observableArray();

    // persons are retrieved via AJAX...
    ko.mapping.fromJS(persons, {}, self.persons);


    self.Name.extend({ required: true });
}